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Direct Conductor Cooling in Concentrated Windings

Reinap, A. LU ; Marquez-Fernandez, F. J. LU orcid ; Alakula, M. LU orcid ; Deodhar, R. and Mishima, K. (2018) 23rd International Conference on Electrical Machines, ICEM 2018 p.2654-2660
Abstract

This paper presents and assesses the cooling integration of electrical machines with concentrated windings. A conventional coil in a concentrated winding with forced cooling applied on the exterior coil surfaces is replaced by an alternative solution where the coil is opened up in a laminar structure with the intention of the coolant fluid penetrating the coil and removing the interior heat. This is a purely theoretical study where a set of FE models are used to evaluate the torque capability under elevated thermal loads, comparing conventional to alternative cooling integration topologies. The objective of the unsophisticated FE evaluation models and simple design rules is to demonstrate the potential of the laminated type of windings... (More)

This paper presents and assesses the cooling integration of electrical machines with concentrated windings. A conventional coil in a concentrated winding with forced cooling applied on the exterior coil surfaces is replaced by an alternative solution where the coil is opened up in a laminar structure with the intention of the coolant fluid penetrating the coil and removing the interior heat. This is a purely theoretical study where a set of FE models are used to evaluate the torque capability under elevated thermal loads, comparing conventional to alternative cooling integration topologies. The objective of the unsophisticated FE evaluation models and simple design rules is to demonstrate the potential of the laminated type of windings where the space between the current carrying flat conductors is used to circulate coolant so that the heat losses are removed in the vicinity of where they are generated. Conjugate heat transfer analysis in Comsol multiphysics based on 2D and 3D is used to demonstrate the cooling capability for air and oil cooled windings up to thermal loads corresponding to 50 A/mm2at 24 nΩm and a target hot spot temperature of 120°C for copper.

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Please use this url to cite or link to this publication:
author
; ; ; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
CFD, Concentrated winding, Conjugate heat transfer, Cooling integration, Finite element method
host publication
Proceedings - 2018 23rd International Conference on Electrical Machines, ICEM 2018
article number
8507094
pages
7 pages
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
conference name
23rd International Conference on Electrical Machines, ICEM 2018
conference location
Alexandroupoli, Greece
conference dates
2018-09-03 - 2018-09-06
external identifiers
  • scopus:85057165519
ISBN
9781538624777
DOI
10.1109/ICELMACH.2018.8507094
language
English
LU publication?
yes
id
29fd06d7-6e82-4bbe-bde0-742857f73036
date added to LUP
2018-12-04 10:04:01
date last changed
2022-11-30 01:44:36
@inproceedings{29fd06d7-6e82-4bbe-bde0-742857f73036,
  abstract     = {{<p>This paper presents and assesses the cooling integration of electrical machines with concentrated windings. A conventional coil in a concentrated winding with forced cooling applied on the exterior coil surfaces is replaced by an alternative solution where the coil is opened up in a laminar structure with the intention of the coolant fluid penetrating the coil and removing the interior heat. This is a purely theoretical study where a set of FE models are used to evaluate the torque capability under elevated thermal loads, comparing conventional to alternative cooling integration topologies. The objective of the unsophisticated FE evaluation models and simple design rules is to demonstrate the potential of the laminated type of windings where the space between the current carrying flat conductors is used to circulate coolant so that the heat losses are removed in the vicinity of where they are generated. Conjugate heat transfer analysis in Comsol multiphysics based on 2D and 3D is used to demonstrate the cooling capability for air and oil cooled windings up to thermal loads corresponding to 50 A/mm<sup>2</sup>at 24 nΩm and a target hot spot temperature of 120°C for copper.</p>}},
  author       = {{Reinap, A. and Marquez-Fernandez, F. J. and Alakula, M. and Deodhar, R. and Mishima, K.}},
  booktitle    = {{Proceedings - 2018 23rd International Conference on Electrical Machines, ICEM 2018}},
  isbn         = {{9781538624777}},
  keywords     = {{CFD; Concentrated winding; Conjugate heat transfer; Cooling integration; Finite element method}},
  language     = {{eng}},
  month        = {{10}},
  pages        = {{2654--2660}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  title        = {{Direct Conductor Cooling in Concentrated Windings}},
  url          = {{http://dx.doi.org/10.1109/ICELMACH.2018.8507094}},
  doi          = {{10.1109/ICELMACH.2018.8507094}},
  year         = {{2018}},
}